Добавил информацию по курсу рубля

moex.py

@@ -1,18 +1,25 @@
-import requests
 import xmltodict
+from cachetools import TTLCache
 
+from session import session, MOEX_BASE_URL
 
-BASE_URL: str = "https://iss.moex.com/iss"
-
-session = requests.Session()
-
+__cache: TTLCache = TTLCache(maxsize=10000, ttl=60 * 60)
 
 
 def bond_sequrities(bond_ticker: str, board: str) -> dict:
-    res = requests.get(f"{BASE_URL}/engines/stock/markets/BONDS/boards/{board}/securities.xml?securities={bond_ticker}&iss.meta=off&iss.only=securities")
+    url: str = f"{MOEX_BASE_URL}/engines/stock/markets/BONDS/boards/{board}/securities.xml?securities={bond_ticker}&iss.meta=off&iss.only=securities"
+    
+    if url in __cache:
+        return __cache[url]
+    
+    res = session.get(url)
     
     if res.status_code != 200:
         return {"error": True, "status_code": res.status_code}
     
-    return xmltodict.parse(res.text)["document"]["data"]["rows"]["row"]
+    data = xmltodict.parse(res.text)["document"]["data"]["rows"]["row"]
+    data["@PREVPRICE_PERCENT"] = data.pop("@PREVPRICE")
+    __cache[url] = data
+    
+    return data